CN103312476A

CN103312476A - Method and base station for transmitting multiple A/N (Acknowledgement/Negative Acknowledgement) information

Info

Publication number: CN103312476A
Application number: CN 201310164578
Authority: CN
Inventors: 刘江华; 马蒂尔斯·温斯特姆
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2009-01-04
Filing date: 2009-01-04
Publication date: 2013-09-18

Abstract

The invention discloses a method and a base station for transmitting multiple A/N (Acknowledgement/Negative Acknowledgement) information. The base station sends a data block to user equipment; the base station receives a sequence and a modulation symbol fed back by the user equipment; the base station acquires the A/N information of the data block fed back by the user equipment according to the sequence and the modulation symbol, wherein the sequence is used for transmitting the A/N information and corresponds to a first bit group in the A/N information, the modulation symbol is used for transmitting the A/N information and corresponds to a second bit group in the A/N information, and the first bit group and the second bit group form the A/N information; and the base station determines whether to re-upload the data block or not according to the A/N information. An error downlink frequency band can be accurately positioned through the embodiment of the invention, only the error downlink frequency band is re-uploaded, and the data of all the downlink frequency bands are prevented from being re-uploaded.

Description

Method and the base station of transmitting multiple A/N information

The application is for dividing an application.Original application is 200910076433.4 application for a patent for invention " method and the subscriber equipment of transmitting multiple A/N information " for the application number of submitting State Intellectual Property Office on January 4th, 2009.

Technical field

The present invention relates to wireless communication technology, particularly method and the subscriber equipment of a kind of transmitting multiple A/N information.

Background technology

Mixed automatic retransfer request (Hybrid Automatic Retransmission Request, HARQ) is a kind of mechanism that improves performance in wireless communication systems.On the down link of system, the application process of HARQ is: the base station at first sends a data block to certain user, and this user carries out verification after receiving this data block.If verification is correct, just send ACK to the base station; After the base station receives ACK, think that the data block that sends is correctly received by the user of correspondence, so just can send new data block to this user.If verification is incorrect, the user will send NACK to the base station; The base station will retransmit the data block that sends to the user, until the user is correct receive after feeding back ACK, perhaps until surpass maximum retransmission.

In 3GPP LTE-A FDD system, in order to support wider system bandwidth, can support simultaneously a plurality of frequency bands, transmission has data block in each frequency band.For the data block of each downstream bands transmission, the user needs to feed back ACK or the NACK (being called for short an A/N) of a correspondence, and this just means that the user need to feed back a plurality of A/N simultaneously in upstream band.In 3GPP LTE TDD system, normally continuous a plurality of subframes are come transmitting downlink data.The base station sends data block to certain user in descending a plurality of subframes, the user feeds back the A/N for the data block in descending each subframe in certain up subframe, and this just means in a subframe needs to feed back a plurality of A/N.Have now in 3GPP LTE TDD system, adopted the method for A/N packing, namely the A/N of each descending sub frame carried out AND-operation, after the logical AND operation, have to an A/N, then this A/N is sent in a sub-frame of uplink.

The inventor finds prior art in realizing process of the present invention there are the following problems at least: because what adopt is the operation of logical AND, when mistake appears in the transmission for a subframe, an A/N who then obtains is a NACK.But the base station can not determine to occur which subframe of mistake according to this NACK that receives, need the data for all subframes are all retransmitted for this reason, causes efficiency of transmission low, and throughput descends.

Summary of the invention

The embodiment of the invention provides method and the subscriber equipment of a kind of transmitting multiple A/N information, and solution must not accurately be located the problem of the downstream bands that error of transmission occurs.

The embodiment of the invention provides the method for a kind of transmitting multiple A/N information, comprising:

Determine to reserve resource;

Need to determine the A/N information of transmission;

Number according to described reservation resource is divided into the first bit group and the second bit group with the A/N information that needs transmit, and the number of definite transfer resource is N;

From reserve resource, obtain N transfer resource according to described the first bit group, obtain corresponding modulation symbol according to described the second bit group;

With the described modulation symbol of described transmission resources for transmitting.

The embodiment of the invention also provides a kind of subscriber equipment, comprising:

The first determination module is used for determining to reserve resource;

The second determination module is used for definite A/N information that needs transmission;

Grouping module, with described the first determination module be connected the second determination module and be connected, be used for according to the number of described reservation resource the bit number of the A/N information of needs transmission being divided into the first bit group and the second bit group, and the number of definite transfer resource is N;

Acquisition module is connected with described grouping module, is used for obtaining N transfer resource according to described the first bit group from reserving resource, obtains corresponding modulation symbol according to described the second bit group;

Transport module, with described grouping module be connected acquisition module and be connected, be used for the described modulation symbol of described transmission resources for transmitting.

As shown from the above technical solution, the embodiment of the invention is divided into the first bit group and the second bit group by the bit number of the A/N information that will need to transmit, from reserve resource, obtain transfer resource according to described the first bit group, obtain corresponding modulation symbol according to described the second bit group, the transmission of each data block each bit exerted an influence, so that can be determined in the base station whether correctly to the information in the upstream band.

Description of drawings

Fig. 1 is the schematic diagram of Resource Block of the PUCCH of first embodiment of the invention;

Fig. 2 is the transmission structural representation of the A/N of second embodiment of the invention;

Fig. 3 is the PDCCH of third embodiment of the invention and the schematic diagram of CCE mapping relations;

Fig. 4 is the up-downgoing mapping relations schematic diagram of fourth embodiment of the invention;

Fig. 5 is the method flow schematic diagram of fifth embodiment of the invention;

Fig. 6 is the sequence of sixth embodiment of the invention and the transmission schematic diagram of symbol;

Fig. 7 is the sequence of seventh embodiment of the invention and the transmission schematic diagram of symbol;

Fig. 8 is the sequence of eighth embodiment of the invention and the transmission schematic diagram of symbol;

Fig. 9 is the sequence of ninth embodiment of the invention and the transmission schematic diagram of symbol;

Figure 10 is the sequence of tenth embodiment of the invention and the transmission schematic diagram of symbol;

Figure 11 is the up-downgoing mapping relations schematic diagram of eleventh embodiment of the invention;

Figure 12 is the structural representation of the subscriber equipment of twelveth embodiment of the invention.

Embodiment

For convenience of explanation rather than restriction, the detail such as particular architecture, interface, technology etc. has been proposed, in order to thoroughly understand the present invention in below describing.Then, it will be apparent to those skilled in the art that, in deviating from other embodiment of these details, also can realize the present invention.In other cases, omit the detailed description to well-known device, circuit and method, in order to avoid unnecessary details hinders explanation of the present invention.In addition, provide in some drawings each functional block.Those skilled in the art will appreciate that these functions can adopt independent hardware circuit, adopt software, the employing application-specific integrated circuit (ASIC) (ASIC) in conjunction with the digital microprocessor of suitably programming or all-purpose computer work and/or adopt one or more digital signal processors (DSP) to realize.

The term that the embodiment of the invention is mentioned " subscriber equipment " includes but not limited to: travelling carriage, UE, fixing or mobile subscriber unit, facsimile machine, radio telephone, personal digital assistant PDA, computer, perhaps other type can be operated in subscriber equipment in the wireless environment.The term that the embodiment of the invention is mentioned " base station " includes but not limited to: the base station, eNB, Node B, site controller, access point AP, perhaps other type can be operated in the wireless environment with aforementioned " subscriber equipment " mutual equipment.

Below by drawings and Examples, technical scheme of the present invention is described in further detail.

In the embodiment of the invention, when base station (eNB) in data block of descending transmission during to UE, control channel (Physical Uplink Control Channel, PUCCH) is middle to feed back corresponding A/N to eNB to UE according to going physically to the correctness of data block check.PUCCH is with transmission in two time slots in a subframe (sub-frame), wherein PUCCH comprises a plurality of Resource Block (resource block), each Resource Block takies 12 continuous subcarriers at frequency domain, takies 6 or 7 symbols (symbol) in time domain.A Resource Block is relevant with the length of Cyclic Prefix in the symbolic number that time domain takies, and under normal cyclic prefix, takies 7 symbols, under extended cyclic prefix, will take 6 symbols.Following discussion supposes that all a Resource Block takies 7 symbols.A user's A/N will transmit in two Resource Block of PUCCH, and wherein these two Resource Block are positioned at different time slots, and the Resource Block that is positioned at second time slot will repeat the data of first Resource Block.Fig. 1 is the schematic diagram of Resource Block of the PUCCH of first embodiment of the invention.Referring to Fig. 1, in the Resource Block of transmission A/N, 3 middle symbols are used for transmitting demodulation pilot frequency (have at most 36 pilot tones to select among Fig. 2, can support at most 36 users), and remaining 4 symbols are used for transmitting A/N.

In the Resource Block of PUCCH, the A/N of different user passes through code division multiplexing together, and wherein the code of different user is mutually orthogonal, is used for distinguishing different users.Each user's A/N is a biphase phase shift keying (Binary Phase Shift Keying, BPSK) or quaternary PSK (Quadrature Phase Shift Keying, QPSK) symbol normally.If the user only has a code word (perhaps transmission block) descending, then only need the A/N of 1 bit, at this moment be a BPSK symbol; If the user has two code words descending, namely adopt MIMO, then need respectively corresponding two code words of A/N of two bits, at this moment two A/N bit modulation become a QPSK symbol.This modulation symbol (BPSK or QPSK) carries out being mapped on the Resource Block shown in Figure 1 behind the spread spectrum.The sequence that spread spectrum adopts is the orthogonal intersection of a two dimension, and the spreading code on frequency domain is that a length is 12 sequence, has 12 different sequences; Spreading code on time domain is that a length is 4 orthogonal sequence, has 3 different sequences.12 sequences on the frequency domain are to carry out phase rotating by a basic sequence to obtain, that is, and and r ^α(n)=e ^{J2 π n α/12}R (n), n=0,1 ..., 11; α=0,1 ..., 11.Wherein, r (n) is that length is 12 basic sequence, r ^α(n) be the sequence of basic sequence through obtaining behind the phase rotating.That 3 length are 4 orthogonal sequence on the time domain, as shown in table 1:

Table 1

Sequence number β	[w(0)w(1)w(2)w(3)]
		0	[1?1?1?1]
1	[1?-1?1?-1]
		2	[1?-1?-1?1]

Fig. 2 is the transmission structural representation of the A/N of second embodiment of the invention.Referring to Fig. 2, modulation symbol m corresponding to a user's A/N is mapped to after through time-frequency domain sequence two-dimensional spread-spectrum in 4 A/N symbols in the Resource Block.Wherein used frequency domain sequence is r ^α(n), the used sequence of time domain is w ^β(n).

For a Resource Block, 12 sequences are arranged on the frequency domain, 3 sequences are arranged on the time domain, always have 36 combined sequence, i.e. 36 two-dimensional spread-spectrum sequences.All users of transmission A/N will adopt the different sequences in 36 two-dimensional spread-spectrum sequences in same Resource Block.Referring to table 2, these 36 two-dimensional spread-spectrum sequences can be carried out following numbering K:

Table 2

Under some specific channel condition, such as the strong channel of frequency selectivity, on frequency domain, can only use 6 sequences in 12 sequences, sequence in interval between two frequency domain sequences, so just can produce 18 two-dimensional spread-spectrum sequences, referring to table 3, these 18 sequences can be carried out following numbering:

Table 3

When the user is transmitted A/N in PUCCH, need to select a two-dimensional spread-spectrum sequence K, and obtain corresponding frequency domain spread spectrum sequence and time domain frequency expansion sequence according to K, then utilize selected frequency expansion sequence to send A/N.The below will introduce the user and how obtain own needed K.

When the eNB transmission data block is to the user, can transmit a Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) come the data block of indicating user on which Resource Block, and transmit used modulation coding mode, the control signals such as pre-coding matrix.The user at first detects PDCCH, if detect PDCCH, and the data block that will go demodulation to transmit according to the indicated content of PDCCH.For the user of dynamic dispatching, each user has a PDCCH.A PDCCH is by 1,2, and 4 or 8 control channel unit (Control Channel Element, CCE) form.The CCE number of a PDCCH of composition is relevant with the size of control channel content and user's channel quality.For example: a user's channel quality is very poor, in order to improve the performance of PDCCH, can adopt 8 CCE to transmit this user's PDCCH, and at this moment user's PDCCH can adopt very low encoder bit rate to resist the decline of channel.

Fig. 3 is the PDCCH of third embodiment of the invention and the schematic diagram of CCE mapping relations.Referring to Fig. 3, one has four users, and the corresponding PDCCH of each user is respectively a PDCCH, the 2nd PDCCH, the 3rd PDCCH, the 4th PDCCH.The one PDCCH and the 2nd PDCCH comprise respectively 1 CCE (being respectively a CCE and the 2nd CCE), the 3rd PDCCH comprises 2 CCE (the 3rd CCE and the 4th CCE), and the 4th PDCCH comprises 4 CCE (the 5th CCE, the 6th CCE, the 7th CCE and the 8th CCE).

The two-dimensional spread-spectrum sequence K that the user is used for feeding back A/N is decided by the position of first CCE of this user PDCCH.The initial CCE of each user PDCCH is different, can determine thus different two-dimensional spread-spectrum sequence K.In a word, the initial CCE of K and PDCCH has a fixing relation, and concrete relation no longer is described in detail in detail here.Suppose K=N _{Index of first CCE}+ 4, then:

User 1:K=0+4=4

User 2:K=1+4=5

User 3:K=2+4=6

User 4:K=4+4=8

Then according to the numbering K of two-dimensional spread-spectrum sequence and the time frequency sequence mapping relations, such as table 2 or table 3 or other similar table (determining the similar table of employing table 2 or table 3 or other according to concrete channel situation), just can obtain sending frequency domain sequence and the time series of A/N.According to the mapping relations of table 2, user 2 will adopt the 1st sequence of the 5th frequency domain sequence and time domain.It can also be seen that from above K=7 can not used by other user, because the CCE that K=7 is corresponding is taken by user 3 PDCCH, so just mean that user 3 in fact can be with 2 two-dimensional spread-spectrum sequences, namely user's correspondence M CCE, just mean to may be utilized having M two-dimensional spread-spectrum sequence.

The LTE-A system will support the user to come the transmission of data with a plurality of downstream bands or upstream band simultaneously, and the user just can come the transmission of data with wider bandwidth like this.This multiple band transmission is a main feature of LTE-A system, but also attracts some problems simultaneously.As user during at downlink data receiving, because the user can't know that whether eNB will have the data of oneself to oneself so just need to constantly detect descending each frequency band by the transmission of data in which descending frequency band, can consume a lot of power like this.In order to reduce user's power consumption, each user has defined a main downstream bands, the corresponding signaling of transmission indicates whether other downstream bands has transfer of data except main downstream bands in the main downstream bands, and different users' main downstream bands can be different frequency band.For example: have 3 downstream bands in the system, be respectively frequency band 1, frequency band 2, frequency band 3; Frequency band 1 so, and frequency band 2 and frequency band 3 can be defined as respectively user 1, and the user 2, main downstream bands of the user 3.After having defined main downstream bands, each user at first detects the data whether main downstream bands has oneself to receive, and then determines whether to detect other downstream bands according to the signaling that receives in the dominant frequency band.If do not have transfer of data in main other frequency band of downstream bands indicating, the user does not just need to detect other sub-band so; If main downstream bands is indicated in other frequency band transfer of data is arranged, the user just goes the frequency band of appointment to detect data, has so just avoided some unnecessary detections.Same reason, if the user when not having too many data to send to eNB, does not just need to send at a plurality of sub-bands all the time when uplink transmission data, can only send in main upstream band.For each user, main downstream bands and main upstream band consist of a pair of dominant frequency band like this.

When descending a plurality of frequency band transmission data blocks were given certain user, the user need to for the data block feedback A/N in each downstream bands transmission, need the number of feedback A/N relevant with employed downstream bands number like this.These a plurality of A/N will send in this user's main upstream band.Three downstream bands and two upstream band are for example arranged in the system, be respectively downstream bands 1, downstream bands 2, downstream bands 3 and upstream band 1, upstream band 2.Wherein downstream bands 1 and upstream band 1 are defined as user 1 dominant frequency band pair, and downstream bands 2 and upstream band 2 are defined as user 2 dominant frequency band pair.If all the transmission of data is to user 1 and user 2 in descending three frequency bands, user 1 and user 2 will bring at Your Majesty's line frequency separately feedback A/N so.Fig. 4 is the up-downgoing mapping relations schematic diagram of fourth embodiment of the invention.Referring to Fig. 4, PDSCHi-j wherein is illustrated in i downstream bands transmitting data piece to j user.

Fig. 5 is the method flow schematic diagram of fifth embodiment of the invention, comprising:

Step 51: subscriber equipment (User Equipment, UE) determines to reserve resource.Wherein, reserve resource and transfer resource and can be time, frequency, code, sequence, antenna etc.The below take reserve resource and transfer resource as sequence as example.According to above-mentioned analysis, for fear of unnecessary detection, the base station is normally in the data block of transmitting for main downstream bands of the user for this user.And in the above-mentioned relevant description of sequence, as can be known can be identical for the number for this user's CCE among the PDCCH of the number of the sequence that adopts and corresponding downstream bands in upstream band.Therefore, the number of reserving resource can be elected the number of the CCE that comprises among user's the PDCCH of main downstream bands as.For example, comprise M CCE among the PDCCH of user's main downstream bands, the number of then reserving resource is M, and according to the relation of CCE and sequence, can obtain according to the CCE of respective user this user's reservation resource (for example can obtain according to the original position of above-mentioned CCE and the relation of sequence K).Certainly, if, user's data send to the user in a plurality of downstream bands, and each downstream bands has the PDCCH for this user, the summation of the CCE that the number of then reserving resource comprises in also can the PDCCH for corresponding this user's downstream bands, for example, the base station at downstream bands 1 and downstream bands 2 transmission data blocks to the user, the PDCCH of downstream bands 1 comprises M1 CCE, and the PDCCH of downstream bands 2 comprises M2 CCE, and the number of then reserving resource is M=M1+M2.Following to obtain user's reservation resource according to the CCE that comprises on the main downstream bands as example.

After determining the reservation resource, can reserve at M and select N in the resource as transfer resource, wherein, N is the number among 1～M-1.

Step 52:UE need to determine the A/N information of transmission.

Particularly, after A/N information that can the code word that comprise in each downstream bands is corresponding is packed respectively, namely AND-operation is carried out in the A/N of each descending sub frame, after the logical AND operation, have to an A/N, thereby obtain the A/N information of the needs transmission of corresponding each downstream bands; Perhaps, the A/N information that the code word that comprises in each downstream bands is corresponding is as the A/N information of needs transmission, thereby obtains the A/N information of the needs transmission of corresponding each code word.For example, downstream bands is 4, each downstream bands comprises 2 code words, then have the A/N information of 8 bits, if according to reserving resource, the situations of transfer resource and modulation symbol etc. judge that the A/N of this 8 bit is more, for example, reserving resource is 4, transfer resource is 2, and modulation symbol is the QPSK symbol, namely only needs 2 bit indication transfer resources, need at most 4 bit indication modulation symbols, remain the information that 2 bits can't characterize transfer resource or modulation symbol, then two A/N of each downstream bands can be carried out the operation of logical AND, obtain the A/N information of 4 bits; When the performance of system can be transmitted 8 bit, also can be directly with the bit number of this 8 bit as the A//N information of needs transmission.

Step 53:UE is according to the number of described reservation resource, and the A/N information that needs are transmitted is divided into the first bit group and the second bit group, and the number of definite transfer resource is N.

Particularly, can be according to the number M of described reservation resource and the number N of transfer resource, determine the number of bits m1 of the first bit group, wherein According to bit number m and the first bit number m1 of the A/N information of described needs transmission, obtain the number of bits m2 of the second bit group, wherein, m2=m-m1.For example, M=4, N=2, then m1 can elect 1,2 as (particularly can according to the actual disposition needs), afterwards, obtains m2=m-m1.

Step 54:UE obtains N transfer resource according to described the first bit group from reserve resource, obtain corresponding modulation symbol according to described the second bit group.

Step 55:UE transmits respectively the modulation symbol that obtains with the transfer resource that obtains.

Below by a plurality of embodiment the situation of the situation of various different transfer resources (can take sequence as example), various different modulating symbols (can take QPSK as example) is described various transmission methods of the present invention.

Mode 1:UE only has an antenna, sequence of this antenna transmission, modulation symbol of this sequence transmission.Suppose to have 2 downstream bands the transmission of datas to the user, each downlink frequency is with two code words, and the PDCCH of main downstream bands is comprised of 4 CCE.Then reserve M=4 (namely reserving the number of resource) sequence in main upstream band, be respectively S1, S2, S3, S4 (namely reserving resource), suppose the number N=1 of the transfer sequence that needs are selected, then transfer resource is S1, S2, S3 or S4.Then needing the bit number of the A/N information transmitted is 4 (m=4), is respectively A/N (1), A/N (2), A/N (3), A/N (4).M=4 bit is divided into two parts, is respectively the first bit group [A/N (1) A/N (2)] of m1=2, the second bit group of m2=m-m1=2 [A/N (3) A/N (4)].Obtain selecting in reserving sequence the transfer sequence of N=1 according to the first bit group [A/N (1) A/N (2)], [A/N (3) A/N (4)] obtains modulation symbol according to the second bit group.Wherein, the relation of the first bit group and transfer sequence can be referring to table 4, and the relation of the second bit group and modulation symbol (QPSK symbol) can be referring to table 5.

Table 4

A/N(1)A/N(2)	S1	S2	S3	S4
					00	√	?	?	?

01	?	√	?	?
					10	?	?	√	?
11	?	?	?	√

Table 5

Fig. 6 is the sequence of sixth embodiment of the invention and the transmission schematic diagram of symbol.Referring to Fig. 6, after the bit of the A/N information of transmission obtains transfer sequence Si and QPSK symbol with reference to table 4, table 5 as required, the antenna of this sequence from system sent this QPSK symbol of transmission in this sequence.For example, if user's A/N (1)=1, A/N (2)=0, A/N (3)=0, A/N (4)=1, the transfer sequence that then obtains according to table 4 is S3, the QPSK modulation symbol that obtains according to table 5 is Q1, then sends Q1 at this antenna with the S3 sequence.The base station is detected after receiving the signal of feedback, and it will detect at sequence S3 and send Q1, and the base station can obtain [[A/N (1) A/N (2)]=[1 0], [A/N (3) A/N (4)]=[0 1] according to the corresponding relation of table 4, table 5.Because A/N is the correct transmission of 1 representative, A/N is the incorrect transmission of 0 representative, and, the base station with the negotiations process of terminal in, learn that in advance A/N (1), A/N (2), A/N (3), A/N (4) are corresponding with second code word of first code word of first downstream bands, second code word of first downstream bands, first code word of second downstream bands, second downstream bands respectively, second code word of first downstream bands just can be learnt in the base station so, and the incorrect transmission of first code word of second downstream bands.The base station just can only retransmit second code word of first downstream bands and first code word of second downstream bands, and does not need to retransmit all code words of all frequency bands.

Mode 2:UE only has an antenna, a plurality of sequences of this antenna transmission, the different modulation symbol of transmission in these a plurality of sequences.Suppose to have 3 downstream bands the transmission of datas to the user, each downlink frequency is with two code words, and the PDCCH of main downstream bands is comprised of 4 CCE.Then in main upstream band, reserve M=4 sequence, be respectively S1, S2, S3, S4, need to suppose the transfer sequence N=2 of selection.Then needing the bit of the A/N information transmitted is 6 (m=6), is respectively A/N (1), A/N (2), A/N (3), A/N (4), A/N (5), A/N (6).M=6 bit is divided into two parts, is respectively the first bit group [A/N (1) A/N (2)] of m1=2, the second bit group of m2=m-m1=4 [A/N (3) A/N (4) A/N (5) A/N (6)].Obtain in reserving sequence, selecting the transfer sequence of N=2 according to the first bit group [A/N (1) A/N (2)], obtain respectively two modulation symbols according to the second bit group [A/N (3) A/N (4)] and [A/N (5) A/N (6)].Wherein, the relation of the first bit group and transfer sequence can be referring to table 6, and the relation of the second bit group and modulation symbol (QPSK symbol) can be equally referring to table 5.

Table 6

A/N(1)A/N(2)

(S1，S2)

(S1，S3)

(S1，S4)

(S2，S3)

(S2，S4)

(S3，S4)

00

√

?

01

?

√

?

10

?

√

?

11

?

√

?

Fig. 7 is the sequence of seventh embodiment of the invention and the transmission schematic diagram of symbol.Referring to Fig. 7, after the bit of the A/N information of transmission obtains transfer sequence Si, Sj and QPSK symbol a1, a2 with reference to table 6, table 5 as required, the antenna of these two sequences from system sent QPSK symbol of transmission in each sequence.For example, if user's A/N (1)=0, A/N (2)=1, A/N (3)=1, A/N (4)=0, A/N (5)=1, A/N (6)=1.Then obtain [A/N (1) according to table 6, A/N (2)]=transfer sequence corresponding to [0 1] is (S1, S3), obtain by [A/N (3) according to table 5, A/N (4)]=first QPSK modulation symbol a1 that [1 0] are modulated into is Q2, second the QPSK modulation symbol a2 that obtains being modulated into by [A/N (5), A/N (6)]=[1 1] according to table 5 is Q3.Afterwards, respectively different modulation symbols is mapped on the different sequences, for example a1 is mapped on the S1, a2 is mapped on the S2.Then send at an antenna after two transmission being had the sequence addition of modulation symbol, be about on two sequence modulation to antennas.The base station is detected after receiving the signal of feedback, it will detect at sequence (S1, modulation symbol is arranged S3), and two modulation symbols are respectively Q2, Q3, the base station is according to the corresponding relation of above-mentioned transfer sequence and modulation symbol and table 6, table 5, can obtain [A/N (1) A/N (2)]=[01], [A/N (3) A/N (4)]=[1 0], [A/N (5) A/N (6)]=[1 1].Because A/N is the correct transmission of 1 representative, A/N is the incorrect transmission of 0 representative, and, the base station with the negotiations process of terminal in, learn in advance A/N (1), A/N (2), A/N (3), A/N (4), A/N (5), A/N (6) respectively with first code word of first downstream bands, second code word of first downstream bands, first code word of second downstream bands, second code word of second downstream bands, first code word of the 3rd downstream bands, second code word correspondence of the 3rd downstream bands, first code word of first downstream bands just can be learnt in the base station so, and the incorrect transmission of second code word of second downstream bands.The base station just can only retransmit first code word of first downstream bands and second code word of second downstream bands, and does not need to retransmit all code words of all frequency bands.

Mode 3:UE has a plurality of antennas, and each antenna sends in resulting a plurality of transfer sequence, and these a plurality of sequences are transmitted respectively different modulation symbols.For example, this mode adopts the assumed condition with mode 2, when realizing, adopt the method that obtain transfer sequence and modulation symbol identical with mode 2, under different just this modes, with two sequences obtaining respectively with an antenna transmission, Fig. 8 is the sequence of eighth embodiment of the invention and the transmission schematic diagram of symbol, referring to Fig. 8, first modulation symbol a1 is mapped on first transfer sequence Si, send with the first antenna; Second modulation symbol a2 is mapped on first transfer sequence Sj, sends with the second antenna.Remaining realizes that principle is identical with mode 2, repeats no more.

Mode 4:UE has a plurality of antennas, and each antenna sends in resulting a plurality of transfer sequence, the identical modulation symbol of transmission in these a plurality of sequences.Supposing the system has 2 antennas, 4 downstream bands the transmission of datas is arranged to the user, and each downlink frequency is with two code words, and the PDCCH of main downstream bands is comprised of 4 CCE.Then in main upstream band, reserve M=4 sequence, be respectively S1, S2, S3, S4, suppose that the transfer sequence that needs to select is N=2.Have the A/N information of 8 bits for 4 descending frequency bands, in the present embodiment two A/N information in each downstream bands being carried out logical AND operates, the bit that obtains corresponding to the A/N information of the needs of downstream bands transmission is 4 (m=4), is respectively A/N (1), A/N (2), A/N (3), A/N (4).M=4 bit is divided into two parts, is respectively the first bit group [A/N (1) A/N (2)] of m1=2, the second bit group of m2=m-m1=2 [A/N (3) A/N (4)].Obtain selecting in reserving sequence the transfer sequence of N=2 according to the first bit group [A/N (1) A/N (2)], [A/N (3) A/N (4)] obtains a modulation symbol according to the second bit group.Wherein, the relation of the first bit group and transfer sequence can be referring to table 6, and the relation of the second bit group and modulation symbol (QPSK symbol) can be equally referring to table 5.

Fig. 9 is the sequence of ninth embodiment of the invention and the transmission schematic diagram of symbol.Referring to Fig. 9, after the bit of the A/N information of transmission obtains two transfer sequence Si, Sj and QPSK symbol with reference to table 6, table 5 as required, these two sequences are sent respectively the identical QPSK symbol of transmission in each sequence from two antennas.For example, if user's A/N (1)=1, A/N (2)=0, A/N (3)=1, A/N (4)=1.Then obtaining transfer sequence corresponding to [A/N (1), A/N (2)]=[1 0] according to table 6 is (S1, S4), and the QPSK modulation symbol that obtains by [A/N (3), A/N (4)]=[11] are modulated into according to table 5 is Q3.Afterwards, this modulation symbol Q3 is mapped to respectively on different sequence S1, the S4.Then two transmission there is the transfer sequence of identical modulation symbol to send at two antennas respectively.The base station is detected after receiving the signal of feedback, it will detect at sequence (S1, modulation symbol is arranged S4), and modulation symbol is Q3, the base station is according to the corresponding relation of above-mentioned transfer sequence and modulation symbol and table 6, table 5, can obtain [A/N (1) A/N (2)]=[1 0], [A/N (3) A/N (4)]=[1 1].Because A/N is the correct transmission of 1 representative, A/N is the incorrect transmission of 0 representative, and, the base station with the negotiations process of terminal in, learn that in advance A/N (1), A/N (2), A/N (3), A/N (4) are corresponding with first downstream bands, second downstream bands, the 3rd downstream bands, the 4th downstream bands respectively, the incorrect transmission of code word of second downstream bands just can be learnt in the base station so.The base station just can only retransmit the code word of second downstream bands, and does not need to retransmit the code word of all frequency bands.

Again for example in one embodiment, 5 downstream bands the transmission of datas are arranged to the user, each downlink frequency is with two code words.PDCCH is comprised of 8 CCE in the main downstream bands, will reserve so M=8 sequence in main upstream band, is respectively S1, S2, S3, S4, S5, S6, S7, S8.5 frequency bands for descending have 10 bit A/N, if two A/N of each downstream bands carry out the logical AND operation, to obtain so m=5 A/N, be respectively A/N (1), A/N (2), A/N (3), A/N (4), A/N (5) need to send to the base station.This m=5 bit A/N is divided into two groups, and group 1:m1=3 [A/N (1) A/N (2) A/N (3)] is used for selecting N=2 sequence Si from 8 sequences, Sj, and the relation of sequence selection is as shown in table 7; Group 2:m2=2 [A/N (4) and A/N (5)] consists of a QPSK modulation symbol, modulation mapping as shown in table 5.

Table 7

A/N(1)A/N(2)A/N(3)	(S1，S2)	(S3，S4)	(S5，S6)	(S7，S8)
					000	√	?	?	?
001	?	√	?	?
					010	?	?	√	?
011	?	?	?	√
					A/N(1)A/N(2)A/N(3)	(S1，S3)	(S2，S4)	(S5，S7)	(S6，S8)
100	√	?	?	?
					101	?	√	?	?
110	?	?	√	?
					111	?	?	?	√

If the user has two transmitting antennas, then send a sequence on each antenna, two sequences send same QPSK modulation symbol, as shown in Figure 9.

If user's A/N (1)=0, A/N (2)=1, A/N (3)=1, A/N (4)=0, A/N (5)=1, being used for so [A/N (1) A/N (2) A/N (3)]=[0 1 1] of Selective sequence, is (S7, S8) according to two selected sequences of table 7 then; [A/N (4) A/N (5)]=[0 1] are modulated into Q1.Use respectively sequence S7 on right latter two antenna, S8 sends Q1, owing to sending same signal on two antennas, therefore can obtain to send diversity.

The base station is detected after receiving the signal of feedback, is (S7, S8) if detect employed sequence, just can get [A/N (1) A/N (2) A/N (3)]=[0 1 1]; And detecting the QPSK symbol that sends on the sequence is Q1, can learn [A/N (4) A/N (5)]=[0 1].The base station with the negotiations process of terminal in, learn in advance A/N (1), A/N (2), A/N (3), A/N (4), A/N (5) respectively with first downstream bands, second downstream bands, the 3rd downstream bands, the 4th downstream bands, the 5th downstream bands correspondence, the incorrect transmission of data in first downstream bands and the 4th downstream bands can be learnt in the base station so, other data are correctly transmission all, only need to retransmit two code words of first frequency band and two code words of the 4th frequency band, and need not to retransmit the data of each frequency band.

Mode 5:UE has a plurality of antennas, a plurality of sequences of a plurality of antenna transmission, at least two transfer sequences of transmission at least one antenna wherein, the different modulation symbol of transmission in a plurality of sequences of transmitting on antenna.Figure 10 is the sequence of tenth embodiment of the invention and the transmission schematic diagram of symbol, referring to Figure 10, supposing the system has two antennas (the first antenna and the second antenna), and the transfer sequence that needs to select is 3, is respectively Si, Sj, Sk, sequence Si, sequence Sj transmit at same antenna, the modulation symbol that Si, Sj are corresponding is respectively a1, a2, and the modulation symbol that sequence Sk is corresponding is a, wherein, a1 is different from a2, a can from a1, a2 in one identical or all different.The concrete mode that obtains a1, a2 and Si, Sj and transmit at an antenna can be referring to mode 2, obtains a and Sk and the mode transmitted at an antenna can be referring to mode 1.

For example, 4 downstream bands the transmission of datas are arranged to the user, each downlink frequency is with two code words, and the PDCCH of main downstream bands is comprised of 4 CCE.Then in main upstream band, reserve M=4 sequence, be respectively S1, S2, S3, S4, suppose that the transfer sequence that needs to select is N=3.Have the A/N information (m=8) of 8 bits for 4 descending frequency bands, be respectively A/N (1), A/N (2), A/N (3), A/N (4), A/N (5), A/N (6), A/N (7), A/N (8).M=8 bit is divided into two parts, be respectively the first bit group [A/N (1) A/N (2)] of m1=2, the second bit group of m2=m-m1=6 [A/N (3) A/N (4) A/N (5) A/N (6) A/N (7) A/N (8)].Obtain in reserving sequence, selecting the transfer sequence of N=3 according to the first bit group [A/N (1) A/N (2)], obtain three modulation symbols according to the second bit group [A/N (3) A/N (4)], [A/N (5) A/N (6)], [A/N (7) A/N (8)].Wherein, the relation of the first bit group and transfer sequence can be referring to table 8, and the relation of the second bit group and modulation symbol (QPSK symbol) can be equally referring to table 5.

Table 8

A/N(1)A/N(2)	(S1，S2，S3)	(S1，S2，S4)	(S1，S3，S4)	(S2，S3，S4)
					00	√	?	?	?
01	?	√	?	?
					10	?	?	√	?
11	?	?	?	√

If user's A/N (1)=1, A/N (2)=0, A/N (3)=1, A/N (4)=1, A/N (5)=1, A/N (6)=0, A/N (7)=0, A/N (8)=1.Then obtain [A/N (1) according to table 8, A/N (2)]=transfer sequence corresponding to [1 0] is (S1, S3, S4), the QPSK modulation symbol a1 that obtains being modulated into by [A/N (3), A/N (4)]=[1 1] first according to table 5 is Q3, by [A/N (5), A/N (6)]=second QPSK modulation symbol a2 that [10] are modulated into is Q2, the 3rd the QPSK modulation symbol a3 that [A/N (7), A/N (8)]=[0 1] are modulated into is Q1.Afterwards, first modulation symbol Q3 is mapped on first sequence S1, second modulation symbol Q2 is mapped on second sequence S3, will send at same antenna after first sequence S1 and second the sequence S3 addition; The 3rd modulation symbol Q1 is mapped on the 3rd the sequence S4, the 3rd sequence S4 sent from another antenna.The base station is detected after receiving the signal of feedback, it will detect on sequence (S1, S3, S4) modulation symbol, and modulation symbol is respectively Q3, Q2, Q1, the base station can obtain [A/N (1) A/N (2)]=[1 0], [A/N (3) A/N (4)]=[1 1] according to the corresponding relation of above-mentioned transfer sequence and modulation symbol and table 8, table 5, [A/N (5), A/N (6)]=[1 0], [A/N (7), A/N (8)]=[0 1].Because A/N is the correct transmission of 1 representative, A/N is the incorrect transmission of 0 representative, and, the base station with the negotiations process of terminal in, learn in advance A/N (1), A/N (2), A/N (3), A/N (4), A/N (5), A/N (6), A/N (7), A/N (8) respectively with first code word of first downstream bands, second code word of first downstream bands, first code word of second downstream bands, second code word of second downstream bands, first code word of the 3rd downstream bands, second code word of the 3rd downstream bands, first code word of the 4th downstream bands, second code word correspondence of the 4th downstream bands, the incorrect transmission of second code word of first downstream bands just can be learnt in the base station so, the incorrect transmission of second code word of the 3rd downstream bands, the incorrect transmission of first code word of the 4th downstream bands.The base station just can only retransmit second code word of first downstream bands, second code word of the 3rd downstream bands, and first code word of the 4th downstream bands, and do not need to retransmit all code words of all frequency bands.

The mode of above-mentioned selection m1, m2 is example, those skilled in the art also can be according to above-mentioned principle, carry out other combination according to the numerical value of concrete M, N, and above-mentioned take the QPSK modulation symbol as example, also can obtain with the A/N bit modulation symbol of BPSK modulation symbol or other order of modulation.

Decided by each CCE with PDCCH corresponding to this user in householder's downstream bands with the reservation resource in the various embodiments described above.In addition, also having a kind of may be exactly that the user has PDCCH in each downstream bands, also can be decided by all PDCCH in main upstream band transmission A/N resource so.Figure 11 is the up-downgoing mapping relations schematic diagram of eleventh embodiment of the invention.Referring to Figure 11, for example, the PDCCH1 in the frequency band 1 is comprised of 2 CCE, and the PDCCH2 in the frequency band 2 is comprised of 2 CCE, is respectively so PDCCH1 and PDCCH2 and reserves two sequences in upstream band, be i.e. M1=2, M2=2.Then in main upstream band, will reserve altogether M=4 sequence.Be about to determine to reserve resource according to the CCE that comprises of the PDCCH of all downstream bands of respective user, with the CCE number that comprises of the PDCCH of all downstream bands as the number of reserving resource.Afterwards, concrete processing mode can adopt above-mentioned mode 1～mode 5 equally.

In addition, top explanation and embodiment all be the resource reserved of hypothesis all in main upstream band, in addition, the resource of reservation also can be in a plurality of upstream band.As for certain user, descending three downstream bands are arranged, up two upstream band are arranged, reserved respectively M1 in each upstream band so, M2 resource, then this user has reserved M1+M2 resource altogether, and the transfer resource that transmits this user's A/N can be chosen from M1+M2 the resource of reserving.

The present embodiment is divided into the first bit group and the second bit group by the bit number of the A/N information that will need to transmit, obtain transfer resource according to described the first bit group, the transmission of each data block obtains corresponding modulation symbol according to described the second bit number, so that can be determined in the base station whether correctly.

One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.

Figure 12 is the structural representation of the subscriber equipment of twelveth embodiment of the invention, comprises the first determination module 121, the second determination module 122, grouping module 123, acquisition module 124 and transport module 125.The first determination module 121 is used for determining to reserve resource; The second determination module 122 is used for need determining the A/N information of transmission; Grouping module 123 and the first determination module 121 be connected determination module 122 and be connected, be used for the number according to described reservation resource, the A/N information of needs transmission is divided into the first bit group and the second bit group, and the number of definite transfer resource is N; Acquisition module 124 is connected with grouping module 123, is used for obtaining N transfer resource according to described the first bit group from reserving resource, obtains corresponding modulation symbol according to described the second bit group; Transport module 125 and grouping module 123 are connected with acquisition module and are connected, and transmit respectively the modulation symbol that obtains with the transfer resource that obtains.Wherein, the number of bits of the first bit group that grouping module 123 obtains is m1, needs to satisfy

Wherein, M is the number of described reservation resource, and N is the number of described transfer resource.

The present embodiment is divided into the first bit group and the second bit group by the bit number of the A/N information that will need to transmit, obtain transfer resource according to described the first bit group, obtain modulation symbol according to described the second bit group, the transmission of each data block each bit exerted an influence, so that can be determined in the base station whether correctly to the information in the upstream band.

It should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not limit it, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment or be equal to replacement technical scheme of the present invention, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solution of the present invention.

Claims

1. a data transmission method is characterized in that, comprising:

Send data block to subscriber equipment;

Receive sequence and the modulation symbol of described subscriber equipment feedback;

Obtain described subscriber equipment to the A/N information of described data block feedback according to described sequence and described modulation symbol, wherein, described sequence is used for transmitting the first bit group of described A/N information and corresponding described A/N information, described modulation symbol is used for transmitting the second bit group of described A/N information and corresponding described A/N information, and described the first bit group and described the second bit group consist of described A/N information; And

Determine whether to retransmit described data block according to described A/N information.

2. method according to claim 1 is characterized in that, described data block sends by a plurality of downstream bands.

3. method according to claim 1 is characterized in that, described modulation symbol is quaternary PSK QPSK symbol.

4. method according to claim 3 is characterized in that, described QPSK symbol transmits from two antennas of described subscriber equipment respectively by two described sequences.

5. each described method according to claim 1-4, it is characterized in that, described sequence can be the sequence that described subscriber equipment uses from M and selects, described M the corresponding control channel unit CCE of sequence, described control channel unit is from the physical downlink control channel PDCCH of the described subscriber equipment of correspondence, and M is positive integer.

6. each described method according to claim 1-5, it is characterized in that, described sequence is for can be N the sequence of selecting the sequence of described subscriber equipment use from M, the bit number of described the first bit group is m1, the bit number of described the second bit group is m2, and the bit number of described A/N information is m, then m=m1+m2, N＜=M

Wherein, M, N, m1, m2 and m are positive integer.

7. a base station is characterized in that, comprising:

Be used for sending to subscriber equipment the device of data block;

Be used for receiving the sequence of described subscriber equipment feedback and the device of modulation symbol;

Be used for obtaining described subscriber equipment to the A/N information of described data block feedback according to described sequence and described modulation symbol, wherein, described sequence is used for transmitting the first bit group of described A/N information and corresponding described A/N information, described modulation symbol is used for transmitting the second bit group of described A/N information and corresponding described A/N information, and described the first bit group and described the second bit group consist of described A/N information; And

8. base station according to claim 7 is characterized in that, described data block sends by a plurality of downstream bands.

9. base station according to claim 7 is characterized in that, described modulation symbol is quaternary PSK QPSK symbol.

10. base station according to claim 7 is characterized in that, described QPSK symbol transmits from two antennas of described subscriber equipment respectively by two described sequences.

11. each described base station according to claim 7-10, it is characterized in that, described sequence can be the sequence that described subscriber equipment uses from M and selects, described M the corresponding control channel unit CCE of sequence, described control channel unit is from the physical downlink control channel PDCCH of the described subscriber equipment of correspondence, and M is positive integer.

12. each described base station according to claim 7-11, it is characterized in that, described sequence is for can be N the sequence of selecting the sequence of described subscriber equipment use from M, the bit number of described the first bit group is m1, the bit number of described the second bit group is m2, and the bit number of described A/N information is m, then m=m1+m2, N＜=M

Wherein, M, N, m1, m2 and m are positive integer.